Pressure indicator transmitters have a digital indicator for providing a local indication of pressure reading, and a 4-20 milliamp output pressure transmitter for sending an analogue signal to control & monitoring instrumentation. The built-in digital indicators can be scaled via push buttons or adjustment pots to any pressure unit or a 0-100% full scaling. No additional external supply is required, since the digital indicator is powered by the 4-20mA current loop from the pressure transmitter.
LEO3 Current or Digital Output Pressure Gauge - LCD digital pressure gauge powered externally by a 2 wire series 4-20mA current loop or a digital interface.
DS200P Sanitary Low Range Pressure Gauge, Switch and Sensor - All in one electronic switch, gauge and sensor designed specifically for use in the food, drink and biomedical industry for measuring process pressures.
DS200 Combined Pressure Switch, Gauge and Sensor - Three in one electronic pressure switch, digital pressure gauge and pressure sensor with pressure ranges from 100 mbar up to 600 bar (1.5 to 9000 psi).
DS210 Combined Low Pressure Switch, Indicator and Sensor - Low range three in one pressure switch, pressure indicator and pressure sensor for use on pneumatics and HVAC applications.
DS201 Combined Pressure Sensor, Display and Switch - Ceramic diaphragm diaphragm based pressure sensor, indicator & electronic switch with pressure ranges from 0-0.4 bar up to 0-600 bar.
DS201P High Range Flush Pressure Gauge, Switch and Sensor - High pressure sensor, electronic switch and digital gauge with an all welded stainless steel flush diaphragm for high viscosity liquids.
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Contents
Product Help
Specifying pressure indicator transmitter features
Indicator type
A pressure indicator transmitter includes a built-in pressure gauge for reading in-situ.
Do you require LCD, backlit LCD, or an LED display?
A display can be configured to display the pressure reading in different pressure units, or as a % full scale, the 4-20mA output, alarm levels, and calibration values.
Output signal
Typically a pressure transmitter with a built-in display indicator will have a 4-20mA 2 wire current loop signal. This 4-20mA signal may include intrinsically safe or flameproof certification for hazardous areas, and HART communications for use in a process plant with other HART enabled devices.
Alarm switch
Since there is a built-in display it is possible to add alarm contact switches on some pressure indicator transmitters which are easily configurable via the display and menu keys.
The contact switches are normally a solid state type such as PNP or NPN, which keeps the size and wiring to a minimum.
Re-calibration
Depending on the product type it is possible to re-calibrate the 4-20mA output signal and the display reading by adjusting the zero and span setting via the display panel menu buttons.
Turn-down ratio
Turn-down the output signal to re-scale the measured range. The turndown ratio defines how low the range can be reduced. A ratio of 3:1 or 4:1 is possible with simpler lower cost transmitters, and increases to 10:1 or 100:1 with more expensive intelligent transmitters.
Will the pressure indicating transmitter need to be moved or re-purposed to measure over a different range?
Checklist for pressure indicator transmitter requirements
Define your pressure indicator transmitter requirements using this checklist:
- Indicator type?
- Output signal?
- Alarm switch?
- Re-calibration?
- Turn-down ratio?
- Pressure range?
- Electrical connection?
- Process connection?